oF thE vArious sChEmEs thAt hAvE BEEn proposED to moDEl how gEnE trAnsCription might work in thE living BoDy, thosE involving ACtuAl physiCAl ContACt BEtwEEn EnhAnCErs AnD gEnEs rEmAin -------, owing to An ABsEnCE oF DirECt EviDEnCE.
A．surrEptitious
B．DECiphErABlE
C．vinDiCAtED
D．suspiCious
E．(E) spECulAtivE